Petal dust is a flat color, used a lot with flowers. Pearl dust gives a sheen that basically will make your color "pearlized". Lustre dust also has a sheen but doesnt give that whitish effect that pearl dust does. Disco dust has a glitter to it, will look like glitter when you use it, kind of flaky look. If you need something that is solid color gold or silver then you go with a highlighter. Some are non edible so you have to make sure you check first. Fairy dust is similiar to disco dust. Hope that helps!